18249434 has 16 divisors (see below), whose sum is σ = 31574400. Its totient is φ = 7748784.

The previous prime is 18249433. The next prime is 18249463. The reversal of 18249434 is 43494281.

It is a junction number, because it is equal to n+sod(n) for n = 18249394 and 18249403.

It is not an unprimeable number, because it can be changed into a prime (18249433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4454 + ... + 7505.

It is an arithmetic number, because the mean of its divisors is an integer number (1973400).

Almost surely, 2^18249434 is an apocalyptic number.

18249434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18249434 is a deficient number, since it is larger than the sum of its proper divisors (13324966).

18249434 is a wasteful number, since it uses less digits than its factorization.

18249434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12077.

The product of its digits is 27648, while the sum is 35.

The square root of 18249434 is about 4271.9356268558. The cubic root of 18249434 is about 263.2791495989.

The spelling of 18249434 in words is "eighteen million, two hundred forty-nine thousand, four hundred thirty-four".